Shaft collar



FIG. 1 is a perspective view of a shaft collar, showing our new design;

FIG. 2 is a front side view of the invention of FIG. 1;

FIG. 3 is a top side view of the invention of FIG. 1;

FIG. 4 is a bottom side view of the invention of FIG. 1; and,

FIG. 5 is a right side view of the invention of FIG. 1. 

The ornamental design for a shaft collar, as shown and described. 